 class Circle {
    double radius;

    public Circle(double radius) {
        this.radius = radius;
    }
    public  double getArea(){
        return Math.PI*Math.pow(radius,2);
    }
    public  double getLength(){
        return Math.PI*radius*2;
    }
}
class Column{
    Circle bottom;
double height;

    public void setBottom(Circle circle) {
        this.bottom = circle;
    }

    public void setHeight(double height) {
        this.height = height;
    }

    public Circle getBottom() {
        return bottom;
    }

    public double getHeight() {
        return height;
    }
    public  double getVolume(){
        return bottom.getArea()*height;
    }

}
